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Flagsmith

Open-source feature flag and remote config platform

As of 25 August 2026, Flagsmith has a free plan and paid plans start at $45/month. Open-source feature flagging, remote config and A/B testing platform available as SaaS or self-hosted. Softwr lists it under Software Development. Flagsmith is available on Web, API.

Overview

What Flagsmith does

Flagsmith is an open-source feature flag and remote configuration platform that lets teams manage feature flags, segments, and A/B tests across web, mobile, and server applications. It is available as a hosted cloud service or self-hosted deployment, with SDKs for major languages and frameworks, and supports gradual rollouts, scheduled flags, and third-party integrations for engineering teams practicing continuous delivery.

What people use it for

  • Gradual feature rollouts across environments
  • Remote configuration without redeploying code
  • Running A/B tests tied to feature flags
  • Self-hosting feature flags for data residency requirements

The honest half

Where it falls short

Concrete and checkable, so you can decide whether any of them matter to you. This is the half of a review a vendor will not write about Flagsmith.

  • The Free plan supports only a single team member, limiting collaboration for small teams.
  • Exceeding request limits triggers overage charges after a one-time 30-day grace period.
  • Enterprise-grade SSO and governance are locked behind the Scale-Up and Enterprise tiers.
  • Self-hosting requires operating and updating the platform yourself, unlike a fully managed SaaS competitor.

Cross-shopped

What people choose instead of Flagsmith

Each pairing was judged by two reviewers asking whether a buyer would genuinely weigh the two against each other. The ones that failed were deleted rather than published.

  • Flagsmith logo
    Flagsmith
    vs
    Unleash logo
    Unleash

    Unleash: Another open-source feature flag platform with a similar self-hosted option.

Pricing

What Flagsmith costs

Taken from the vendor's own pricing page. Prices move, so check before you buy.

Free

Free

  • Up to 50,000 requests/month
  • 1 team member
  • Unlimited feature flags, environments, identities and segments

Start-Up

$45 /mo

  • Up to 1,000,000 requests/month
  • 3 team members
  • Scheduled flags, 2FA, A/B testing, integrations, email support

Scale-Up

$300 /mo

  • 5,000,000+ requests/month
  • 5-20 team members
  • SAML/SSO, governance features, priority support

Capabilities

Features

  • Feature flags

    Toggle features on and off per environment without redeploying

  • Segments

    Target flag rollouts to specific user segments

  • A/B testing

    Run experiments using flag variants

  • Scheduled flags

    Schedule flag state changes for future dates

  • SDKs

    Client and server SDKs across major languages and frameworks

  • SAML/SSO

    Enterprise single sign-on and governance controls

Answered, with sources

Questions people ask

Each answer names the page it came from, so you can check it rather than take our word for it.

What does Flagsmith cost?

Flagsmith has a Free plan, a Start-Up plan from $40-45/month, a Scale-Up plan from $250-300/month, and custom Enterprise pricing.

Source
Is there a free plan, and what are its limits?

The Free plan supports up to 50,000 requests per month and 1 team member, with unlimited feature flags, environments, identities and segments.

Source
How is usage metered?

Usage is metered by monthly API requests; exceeding a plan's limit triggers overage charges starting around $50 per million requests, with a 30-day grace period the first time a paid plan exceeds its limit.

Source
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Softwr does not host reviews and shows no star rating for Flagsmith, because a rating we did not collect is not ours to publish. What is here is the pricing and platform detail from the vendor’s own pages, limitations we could state concretely, and alternatives a reviewer confirmed people weigh against it. Tell us if any of it is wrong.

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